Molding-machine.



W. LEWIS MOLDING HAGHINB.

APPLICATION FILED JULY 3, 1909.

941 ,999. Patented Nov. 30, 1909.

e sums-sum 1.

IV! MES: INYENTUR 4 TTORHEI.

W. LEWIS.

MOLDING MACHINE.

APPLIOATION FILED JULY 3, 1909.

Patented Nov. '30, 1909.

6 SHEETS-SHEET 2.

WITZESSES W. LEWIS.

MOLDING MACHINE.

APPLICATION FILED JULY 3, 1909.

6 sums-sum a Patented Nov. 30,

{6 lumrron I fl Arman.

W. LEW-IS.

MOLDING MACHINE.

urmourou FILED JULY 3, 1909.

Patented Nov. 30, 1909.

6 SHEETS-SHEET 4..

. II'ETOR w.- LEWIS. MOLDING MACHINE.

-' APPLICATION FILED JULY 3, 1909.

941,999. Patented Nov. 30, 1909, 6 SHEETS-SE29! 5.

5 K 9 3 721 3:: .r 2 14 J1 W. LEWIS.

MOLDING MACHINE. APPLICATION FILED JULY s, 1909.

Patented Nov. 36,1909;

6 SHEETS-BHBET 8.

7114' Arm/15y.

'WILFEEL LEWIS, OF Pl-HLADELPHIA, EENNSiYLVANIA, ASSIGNGR THE EAIBOR MANUFACTURING GQMPLQNY, 0F CAMDEN, NEE? JERSEY, f1. CUBPQBATION OF NEW Momma-moonlit ti i ,ilti iifl,

Specification of Letters Fatent.

iFeslentefi Nov. 3t), 1309.

Application filed July 3, 1909. Serial falo. 505,850.

' ing machines of the kind in which t2. reln tively n'n'ivnhle mold support and anvil ere employed and the sand OT other mold fornihtg mutei'ini is compacted about the pattern o1- patterns by alternately Separating the mold support and anvil and then caneing; them to eollide the shoal: o1 jot prodteel h}! collision of the mold Support with the anvil, settling the sand went the pattern. hioldin machines of this type, in which collision 1S nought about by first lifting the mold support with the flask, pattern or patterns and loose sand mounted. theremi, above the anvil, and then allowing the mold support to fall un il it strikes the anvil, are now in (BXi'UDSlVQ use, and where the conditions are fevonble their employment, they have given very geneiial i'zdifieation llevetofore, their fifllf, oi usetulne has been limited, however, because oi the dilliculty in providing it satistnvtoi'y foundation for them. With the stationary anvil heretoforeemployed, the jar transmitted to the foundation is :1 severe one, 2 will be readily understood when no count is taken of the feet that the mold suppoi't, flush", pattern, and sand supported thereby, in large machines may weigh as much as ten ions 01' more and that this Weight is nlloived to drop with substantial freedom until arrested liy the anvil, tlnfough a distance of several, usually three or four, lmilliS. Beennse toe 3:11: thus transmitt d to the support, it has heretofore been impoesihle to mount even moderate sized ninchines of this type directly on the upper {loot- 1 of buildings. It iS of course possible to use u machine (it this type on the 1 per floor of :1 building if a special snppo ,7 eolunni is run from the main foundation up through the various lower floors to'the pul'tii-uhn' iioov on which the molding ninchin-s instullwl, but this expedient, which has been employed in practice, is expensive nnsotisiieetoiy. Even when the moldin machine is mounted on the ground, trouble has. experienced from the shaking down and destruction of previously formed molds stocked. up in the vicinity of 69 the nine no. i

The object o present invention is the production o satisfactory molding n"; :1- chine of th *pe referred to, l'iaving suitjahle "visions for preventing the transmission any injurious pies, due to the blows of the mold support against the anvil, t0 the support or foundation upon which the molding machine is mounted, thus making it possible to employ the molding machine in. 70 any location where the static Weight of the molding inuehine and the tlask, patterns and sand. cnvried by the mold'snpport can be ppm-ted. This l accomplish by pro- 21 movable or l miting anvil and by providing also means in giving the anvil a inoven'ient relative to the support 01' foundation upon vihieh the machine is mounted, which is opposite in direction to the anvil striking movement of the mold support, and 50 is of a velocity, at the instant of collision, such that the momentum of the anvil is eoingmrnhle in amount with tlie'moinentum it the mold supp and its loud at that instant, VJhere the inonuintnni of the anvil is 8 QXuCily equal innmount, but opposite in direction, to he momentum of the loaded mold support, the momentum of each is destroyed bv the other on collision. ln pr'netiee, how-i ever, i. sometimes pvelei' to give the anvil. a momentum at impact slightly less than the momentum of the loaded mold Support. This i Sllltf. of course, in giving the anvil e slight initial velocity downxvnid after impe t, and this unhnluneed portionot' the mo- 9 inentum of the mold suppoitis useful in quickly ifellll'lllllg' the mold support and an vii to the original position, thus-increasing the rapidity of operation of the nmchine.

in the prineiyml type 0i jar molding ma- 1 G chine in practical use at the pitiesent time, the mold suppm-t and nnvil are donnected by a piston and cylinder, and the n told Support is first lifted oi? the strilting' iface of the anvil and then allowed to dropfhntil its m0- of gravity to thereby acquire the momentum destroyed during impact. In a machine of the type referred to, I prefer to give the counter momentum to the anvil by mounting the latter on a resilient cushion of such a character that the weight of the anvil,

mold support and load is resiliently supported or balanced at a relatively low level when the weight of the mold support and its load is carried by the anvil, while when the ,5 weight of the mold support and itsload is taken oil the anvil, as it is when the mold support is allowed to drop, the cushion moves the anvil to a higher level. With such an arrangement the cushion exerts an initial net etlective upward force on the anvil in excess of the weight of the latter which is equal to the weight of the mold support and its load. If the effective force exerted by the cushion'to move the anvil upward re- 5 mains constant during the upward movement of the anvil (friction being "disregarded), the velocities of the mold support and the anvil at the moment of impact will. obviously be inversely proportional to their 30, masses, and hence their momentiuns will be -egual in amount at the instant of collision.

I the cushion is of such character that the force ur in the anvil u award decreases somewhat during the upward movement, themomentum of the anvil at the instant of impact will be slightly less in amount than that of the mold support, but if this portion is relatively small it is 'not objectionable and, as I have before indicated, may be advantageous in facilitating the rapid repetition of the sand settlin impacts.

Where the anvi is given its upward velocity at the instant of impact by a resilient cushion acting between the anvil and the base of the machine or the machine support,

the fact that th momentum of the anvil is not exactly equal inamount, though opposite in direction, to dim momentum of the mold sup ort and its load, at the instant of collision o .es not riisult in transmitting any portion of the shock of collision, properly speaking, tothe support for the molding machine. Of course in such cases the anvil is given a downward impulse at the instant of impact, and this must be checked either by increasing the tension of the cushion or o herwise, by the time when the anvil rctu as to the desired lower levcl,'but when this downward impulse of the anvilis checked by an increase in the tension of the cushion, the increase of the load on the support for the molding machine as a whole, due to the increase in the tension of the cushion, takes place gradually and does not 55 partake of the nature of a jar or-blow.

ism other than i'iui The resilient. cushion which I prefer to form may be formed by springs, preferably coiled steel springs, by an elastic fluid, air, under pressure, or in part by a compressed body of air or like fluid and in part by springs. Other resilient cushions can also be employed to give the anvil the desired upward velocity at the instant of impact.

The various t'caturesof novelty which characterize my invention are pointed out with particularity in the claims annexed to and fmimiuga part of this sprcilication. For a better iHider-standing of the invention, however, and the advantages possessed by it, reference should be had to the accompanying drawings and descriptive matter in which i have illustrated and described sev eral of the many forms in which my invention may be embodied.

()f the drawings, Figure l is a sectional elevation of a molding machine embodying my invention, and a somewhat diagrammatic representation of a portion of the fluid pressure supply pipes and valves therefor. Fig. 2 is an elevation, taken at right angles to l ig. l, and partly in section, showing a portion of the valve mechanism which-may be employed with the apparatusof Fig. 1. Fig. 3 is a view taken similarly to Fig. 1, showing a slightly modified form of moldingv ma chine. Fig. 4. is also a view taken similarly to Fig. 1, showing a third form of molding machine. .Fig. 5 is a View taken. similarly to Fig. 1, showing a different form of fluid ,ressure controlling mechanism. Fig. 6 is an elevation, partly broken away and in section, of a nioldin machine embodying my invention, in whic ower actuated mechanpressure mechanism is employed for lifting the mold support oil the anvil. Fig. 7 is an elevation, taken at right angles to Fig. 6. Fig. 8 is a sectional elevation of-a manually actuated molding machine embodying one form of my invention. Fig. 9is a sectional plan on the line 9-4) of Fig. 8. Fig. 10 is a side elevation of a second type of manually actuated molding machine embodying a form of my invention, diliering from those shown in the other figures of the drawings, and Fig. 11 is an elevation, partly broken away and in section, showing av molding machine equipped with av form of my invention in which the anvil floating cushion is formed in part by springs and in part by compressed air.

In the drawings, and referring first to the construction shown in Fig. 1, A represents the mold support which is formed at its upper end. with a table A on which the pat terns, flask and mold forming material are placed, and the latleris compacted by jarring the table. l

B represents the anvil, and E the base oi the molding machine. The anvil and mold 1 a? formed, one with L piston and .r with, a cvliml in 3;. do the piston lza. the l oi'm Shown, the cylinder A 1o meal on the liiOlll support, eml the piei an inie Mn of the a i 2 ifoin'ierl n ll n :mlohmliu, and the hpccific valve much nisn' forms no .fic il l llllitlllll llioiigh in .-.e1ncwha't Ii UlTiSl' [hill 21. proper ;:-e2';:-;1on onlllO 1 may he llu-"tialeii .75.12 with an inlet ie connecl'erl. ho a lay :1-

sii, m1 e2:- ectc an exhaust che'nhcr Q n [he g0??? 3 Fig M or should have flexible Valve cont-rolled e chamber C ctiv "f poi-l {his opcnml.

1, the purl; 1

is closed pislon portion 1 ilOEgziPll anal pz'oje it all times into C the v e cursing ,(j.

' 1 the finial. pleasure actlhe chain *5 l, U valve in the posh C? is closed.

' out of, mini ition shown ion m H130. e2 must from the chainillllkllll )B'QHFJUTG- mlinitted the form shown,

z 'w ll) lo. :zml (fP-Illilllt" from, the vonlmllerl by a pilot who R l which :amwcx lo zaltci'imtcly con- Lppct eml oi" the: lollies cylinder A, null is in (.UEHYRHZZHCHUGD fl'i, oilicr cml with the interior of a valve to the side of the body of valve mechanic: in the which arc cllga piston and cylinder ai'rangg'cmeni'.

necl; the pipe C Willi a supply pipe R connecacd "J10 pipe M, and Willi an cXna-ust pipe R". The stem 3' of bhc pilot is adapted to he cngii-gefl :md depressed against the action of the spring 1 3. by lateral extension S), will the lever S. The lever S is mounted in e bmozct S secured in the easing of the valve C, and is provided with two arms Sl'ancl 5 adapted to be alternately c11- gegecl as the mold support. reaches theupper and lower limits its movement with. re wool to he anvil by collar-s A" and A adjiistally mounted on a mi. .v" carried by the mold Sunpozt extending parallel in the axis of the cylinder A. The level .6 is l" '85 to its pivot pill A. friction washer S li'lfiel'liifl hetwcczi. the head S of the pivot gin and llic adjacent side, of the limclict ri and a helicalspz'ihg S" is luced 2m; ml llie opposite end of "the pin u 0%- twcen the not hi and; the adjacent side of the bracket S Tlhc spring aml frictional washer arrangement described form frictional means "for holding the lever S in either position in which it is moved by the stops A" and l-lf until the level is positively moved in fine opposite direction. To guard. against an excessive movement of the mohl support A away from the face ll of the a fill-l the vawc l) is provided, as shown, with a stem D which through a slot owned in the arm if, and carries mils l) at its upper end goal by ihc arm S When lhc lever is; is given a. i'novemex'ii slightly in exof that reqoi cl to throw the valve R into the position in which ia connects the pipe C to exhaust. when lhi's engagement lalceii place, lhc valve positively shifted to connect lhe cylinder space A to exhaust. Cushion springs D and l) are provided in the valve casing (,ilfOl" cushioning; llic 11loveniem' of the valve member I).

The valve ..mechanism described for controlling the admission to and exhaust from the limler space of the mold supportof .the Working fluid, possesses certain features of novelty which are not claimed herein as they form the sulijcct matter of my copcnrling uppliration, Serial No. 561,133, filed Jun th, 1909.

To, avoid the i 'ansmission of shock, which lhc object of lhe present invention, lhc anvil B and support E are connected by a In the form shown in Fig. 1, the anvil is formed at its lower end with :1 pisfmi l3", and the Sll1 poi? E with a hollow cylimlerll in the cylinder space in chmnhci' 4: in which this ison works, and means are provicled for introducing fill'lil umler pressure to the chamber 0. A'stm'i'ing box E is provided at ihe upper end oi tho cylinder E to prevent eul'mgc. The llHHYlS shown for introducing the prewaui'c fluid comprise a pipe l! which op ns into the liol'tonioi the chamber a and time transmitted corrc. i

amount of the friction, for one instant of constant during; the upward movement oi the anvil, the upward velocity acquired by the anvil at the instant of collision with the mold support would hear the same relation to the velocity of the mold support as the reciprocal of the Weight of the mold supiort and its load bears to the Weight of the anvil. Under such cohditions the momentum of the anvil would be exactly equal to the momentum of the mold support and its load ut the instant of impact.

It friction retards the upward movements of the piston B and its support, and it the pressure of the air in the space e decreased somewhat with the upward movement the anvil, as the case with the apparatus shown in Fig. l, the upward velocity ol the anvil is correspondingly decreased and the momentum of the anvil at the instant of impact is somewhat less than the momentum of the mold support. The efi'ect of friction between the anvil and its support opposing their relative movementsis to cause the transmission of a portion of the shock of collision to the anvil-support The shock mds to double the impact the diu'ectiou.v of movement oi the auyi and the directioi' of the frictional pull exerted by the anvil on the anvil support are reversed. Some frictional retardation may be advantageously employed, however, for the purpose of damping out secondury oscillationsof the anvil .lt will be readily understood, of course, that alter collision, the anvil should he returned to the original position before the mold. support is raised or while it is being raised preparatory to the next drop, endv where the momentum oi? the mold support at collision is in excess of that of the anvil, the insures an initial downward impulse to the anvil which may 'be relied. onto return it to its lower level.

here the pressure in chamber 5 falls and rises with the up and down movement of the anvil, the latter will be driven slightly below the llllilul position except in.

so for as its moveioent is impeded. by '1ction, but this excess of downward movement is compensated for by the slightly higher velocity acquired by the anvil at the follow ing instant of collision and, disregarding friction, the cll'ectiveness of the shock of collision is substantially the whether the slirlpressure in cylinder space 0 varies with the movement of the anvil, or not. [is a matter of fact, in practice, the movement of the anvil is comparatively small and the volume of the air cushion when. the anvil is in its lowest position can easily be made great- .enough to preventjany very great variation in the pressure of the air cushion.

In a molding machine of the tyne described, the sand compacting effect 0. collision is dependent upon the sudden change Lose 5 in velocity of the sand produced by collision. With my invention, where the m0- mentum of the mold support and its load is substantiallyequal, but opposite in direction, to the momentum of the anvil at collision. the total actual velocity of the mold support is clest-roycdin collision, and hence the effectiveness of collision in compacting the sand is dependent on the actual velocity of the mold support at the beginning of collision. Where as in the forms of the invention disclosed, the force acting on the anvil to move it upward prior to collision is the same that acting on the mold support and load to cause their downward movement, with a fixed extent of movement of the mold support relative to the anvil, the actual velocity oi? the mold support at the heginniiu;

of collision. varies with, though not in direct .pi'oportion to, variations in the weight of the'anvil. lin consequence, under these con ditions, the effectiveness of the machine Will increase with an increase in Weight of the anvil and in practice I consider it desiraolein all cases to make the anvil at least as heavy as the mold support and the maximum load impressed upon it.

instead of forming the anvil with the piston, and the base with the cylinder, as

shown in Fig. 1-, it of courseolwious that the anvil may he formed with a cylinder and the base with a piston, and in Fig. 3 I have illustratedn" construction in which the lower portion ofthe anvil is formed with a piston chamber l3 and the base E is formed with a cooperating piston E. The operation. of the apparatus thus described is ob viously'the same in minimizing the transmission of shock to the base of the cylinder 'as'in the construction shown in Fig. 1.

In ihE COIEStI'IICUOII shown in Fig. 3, l have shown a means for connecting the pipe ll either to the discharge pipe -0 or to a compressed air pipe J which comprises a single rotary three-way coclr G mounted in a casing O and'provided with a lever connected to a bracket l" secured to the valv casing C by a link P.

in Fig. l l have illustrated a construction in which the resilient cushion is formed by steel springs instead of compressed air. in the particular form of construction. illustrated, the piston 13* of the anvil is formed .ot its lower end with a plurality of vertical sockets B in each of which is received the upper end of a corresponding helical spring Q, the lower end of which spring is receive in a corresponding socket E in the portion of the base member E forming the bottom wall of the space a. The resilient cushion formed by the springs t is capable of performing the same function as the compressed sir cushion in giving the upward movement to the anvil when the Weight of the mold support and its load is taken oil of it to which means are provided for maintaining thereby prevent the transmission of the shock oi. collision to the base'l There are, however, certain dill'erencesin operation between the iiircushion and the steel spring cushion, and each cushion presents certain advantages and disadvantages, as compared with the other cushion, which may make it desirable to use the one cushion in some cases and the other cushion in other cases. In some cases also, as hereinafter explained, a resilient cushion, formed partly by springs and partly by compressed air, be advantageously employed. Where the steel spring cushion is used there is of course a saving of the compressed air, used in floating the anvil where the compressed air cushion is employed. With the steel spring cushion also, the valves and piping for supplying and controlling the air cushion are dispensed with. Where the steel spring cushion is employed there is of course an appreciable decrease in the tension of the springs at the instant of collision from that existing when the anvil, mold support and load are stationary and are bal anced by the springs. The decrease inthe tension of the springs when the anvil moves from its lower position to its upper position may be reduced, of course, by increasing the length of the springs, but for practical reasons it is not possible to greatly vary the lengths of the springs, 1 consider it desirablc in all uses to have the springs long enough so that the compression of the springs with the maximuni weight impressed on them shall somewhat exceed twice the maximum drop of the anvil, and in practice it is hardly feasible to use springs in which the maximum compression is more than three or four times as great the maximum movement of the anvil. witli the compressed air cushion, on the other hand, it readily possible to make the cylinder space occupied bythe air cushion when the anvil is at its lowest position, great enough, orto connect this space with reservoir of such capacity, that the chai o in volume of air under pressure ocou the upward movement of the .iuite small, with 'a'corresponding small change in pressure. Moreover; I have i'iercina'fter described an arrangement in 4 the pressure of the air cushion practically constant during almost the cntirc upward stroke of the anvil. With the long steel springs, variations in the weight ofthe mold support. and its load cause substantial varia 1 Lions in the height. oi the anvil and mold support when they are at rest. T111638 variations can be easily avoided with the air cush ion, which desirable, of course, for there is usually some one level for the mold support which is more con venicnL than any their level for putting on the flask, patterns andllnold forming material and removing the mold.

of its movement.

While the variations in the tension of the cush on, whether it be a compressed air cushion or a steel spring cushion, results in a variation in the pressure exerted bythe E when used with the steel springs of Fig. 4, is not to prevent air, leakage buts mply as a brake to damp out secondary vibrations of the anvil, and by suitably regulating the size of the port E throu which air flows into and out of the cylint or space 0, any stuffing box or otherfrictional brake connection between the anvil and the base member may be dispensed with.

In the arrangement shown in Fig. 5 I have provided means for maintaining the tension of the compressed air cushion practically uniform throu boutthe operation of forming a single niol' invention an automatic pressure reducin valve Z is provided in the pipe whic should be set at the beginning of each mold forming operation to maintain a pressure at the outlet side of the valve exactly equal to the tension of the compressed air in the cylinder space a necessary to support the weight of the anvil, the mold support and the load carried by the latter. I have not thought it necessary to illustrate the details of the construction of the automatic pressure rec] ucing valve Z, as such valves are in commo'n use. It will be sufli'cient to say that the valve may be adjusted to maintain different pressures at its outlet side by turning the hand wheel .7. In this form of my inven tion the valve G is open and is in iree communication with the outlet side of the valve In this form of my Z during nearly the entire range of movement of the anvil, To bring this about I have arranged the lover ll with a bearing surface H against which the face of the lug I hears during the major portion of the normal up and down movenilznt of the anvil. 'lhc cam surfaces Ti and ,ll of the lever ll are located above the surface H and these surfaces ll", ll" and H.- are so arranged relative to the faceand inclined sides l and I of the lug I, that the. lever H will be shifted to pcrn'iit valve (l to close,

and open valve (l only when the anvil approaclios closely to the desired upward limit In consequence of this arrangement the pressure in the chamber (2 remains constant during the major portion of the upward movement of the anvil occurring during the falling movement of the mold support.

j he permitted to impulse after collision 'in communication Willi the supply pipe 'With the apparatus shown in Fig. 5 I take the air for producing the relative movemffii between the mold snono'rt' and the anvil from the chamber 0. To accomplish this 1 have formed a channel B in the anvilwhich extends from the lower end of the piston 13* to (he inlet-chamber C of the valve casing C. in cm seqnence when the mold support the elriking face B of the anvil, and lhc valve moved to put chamber C info commonicolion with the chamber C the air from the chamber ii" passes into the sgace in the cylinder A Lil/ ove the piston 33 to raise the mold support'ofi the anvil Where the air for raising the II-iOltl sup port ofi' ihe anvil is taken from the c when 6, as in Fig, 5, it ie of course essential that. the ratio between the areas of the piston ii and B should somewhat exceed the ratio of the combined weight of the anvil, mold support and maximum load thereon to the combined Weight of the mold support and its maximum'load.

With the apparatus shown in Fig 5, ihe relatively large volnnie of air which nine" escape from. the space a in the proper downward moveortler to permit ment of the anvil after collision is utilized,

on descriheih in producing the desired reliv live nim'enienl, helweon the anvil and the mold support. in order to obtain lhe dothe anvil following collision, with the no paietns shown in Fig. it is desirable to so arrange the lever H relative $0 the lug 5. that "the valve {,v will open slightly pi ioii' to collision, and hence slightly reduce the pressure in lhe chamber e at the instant of collision, the consequent slight preponderence of the momentum of the mold support over that of the anvil at the instant; of imanvil the slight'downward gives the necessary ior sue pact ceesful operntioi'n iiy taking on manner shown in.

the space 6 in the I 5, l avoid the use of lhe ilexildc pipe seciion M? of Fi l. between the inlei port (1 of valve caning; t) and the source of fluid pressure, and; I can also dispense with any flexible pi e con neclion to the ,pilol valve R by con illecting the pipe lo 21 channel Bi'ormedlin the piston B terminating in a pocketB in the side of the piston which at all tim from if i

The latter pipe may be connected either to exhaust- T or to a pressure fluid supply pipe "l" through a hand operated valve T ilvoidance of flexible connections, however, While :nlvnnlngeous in some cases, is not nsuallv a limiter of importance, and as l have indicated lwi ore, there ie ordinarily bolt li icle mivunnige obtained lay admitting l l l l 1 l l l l i l l l l l r 21 molding machine in Wln than finid under premix-c, and in Figs. 5 llllll 4 have shown the invcnuon iipgil' l lo a molding machine in which a novel arrangement of parts is provided for lilling the mold support oil the l through n1 w-anzn-- icel connections. in l 4 ll'lli o? the zip-- pin-nine the anvil has joi 'lllllitl in it 23 trainee verse shaft U carrying (rein 1" at opposite sides of the anvil. The ll has =;ecured lo one oi pyol'oiwihly to each end, as shown, a wheel. J, engng ii tii'l ing hell or chz'iin U. The lllUl support A is; pvovided with l;

of which are jonrnnlcil (712111 rolls. t adopted lo he engaged ny the mine ll; l l' ilh this construction the rotation of the sln f'l "C iteval bosses 13" iii. llac ends auses the (nine ll lo alternately h. the moio support oli' the anvil when the in portions of the cams U engage the '1 mell", and to perinii the mold support to drop whenlhe nigh portmn oi in come pass out from under tho rol In the particular uppizrzilne shown in *i Mind 7, spring Q :ivmngwl 21R hmvn in Fig. l, are provided to re ilientl}; sup port iln' anvil. in lhe form of lbilfll'lillh shovvn in llaeee ti l3 flows hack and forth through the port, l3", :iseiets also, ilhe deoii'ed novemenm to the anvil and mold support. .1 t the Seine iiinc the compression oi air iii-the Spilt in the cylinder A when (he mold filipptll'l is falling, retards: the liilijing' movement. of the mold i fllppOll' to some and lhis generally epi'rniiing', a da e feature, for

ivhen the mold support nlle p -will: lilt' flnll acceleration tlll lo gravity 1o sand does not hem as firmly against Ihi pnttorn.

during the fallingmovemeni 0 {he mold support, as is desirable particularly will] shine clnsees of Work. if (.(llliIS-Q the reinr- (lution of the i'ulliiig movement oi the mold snnport decreases the effectiveness of the collision, and no ndviiningc ie gained by checking the vein it'y just prior to in'ipncl.

but a decrease in .he downward velocity of.

the mold snpporl tln'migzhonl the ailing '-nl. and not merely ill' toe tfiWLl eno,

inov I is a ,nilmlunlml maven: in F-IUlllL noes}.

\Vith the arrangement shown in Figs. 6 and i the alternate increase and decrease of the air pressure in the chamber a and in the chamber of cylinder A above the anvil piston lends to ve the anvil an excess of molfi-l'iillllll over that of the mold support at mllision. lint some dillerence in the anvil and mold support nionientums in either direl-lion is of no great in'iportance. Where the anvil has the motel. momentum at col lision lnc eleval'ion of the mold support prepurulorv to the lollmvin collision facilitalc l. lYhere the secondary oscillations of the anvil are damped hy rcgulalinq the flow of air lln-our h a rcslrioleil port as the port ll". llicrc is no lransuii sion of shock due lho damping of the oscillations l'here when the o.-4 -illalions are damped h v 'lriclion l)!*l\\'(,(l'l lihc anvil and the support of llm machine.

ll will of course he understood lhal. the UH: o!" the mechanical mnncclions shown in Figs. 6 and Y for lifting: ljhe mold suppoiil. oil the anvil does not prevent (he use of any 1 of l he oilicr forms of cushion described herel in for floating (lie anvil. ll itli the exact alrucl'urc shown in Figs. 3 and 7, when none pressed air of the proper tension is admitlml llu-ougrh ll/c valved pipe l llie springs Q may be dispensed \g'il h. yunvided the cross seclioual arm ol' llw pislou ll is made subslnul iall v in proportion lo weight of lhe mold support lhan the cross sectional area ol the piston ll" lo the combined weight of The anvil and mold support.

l l n Fig. 6 l have shown means comprising cars 3. l3 and E on the mold support A, anvil ll. and l')l1f'-. member E, respectively and a vertical rod V secured in the ear and sliding l'hrough the cars B and A for 'n'cvenring rotation of any one of the members A, -3. or E relative to the other. Home provision such as lhie. for preventing rol'r uion between these name. should he en1- plo vcrl, il; will. he unl lersliood. in all of the various loalures ol' am'raraliis disclosed.

ln some ca it lhought desirahle to inc manually actuated jar molding machines in order lo avoid expense in tnc construction and ii'naliallz-ilion of i'nolding machine, or lJQ-- cause no source o a" power is available, or for other ream. and in 8 and ll 1 have shown one Form. and in Big. 10., a second form. of a manually actuated molding ma hine, in which some 'liealurcs of my pro out izlVl'DiClOIl are utilized. lo the machine shonn in Figs. 8 and 9, the anvil ll is provided with a cavity ll in which lhe piston cueion FL of the l mei'nher l1 re-- (:1 Wed. A cavil v l" formed in lhe upne ends: of lla; piston l d. and a spring Q is placed in this cavity with its lower end re ing on the bottom of lhe cavily and the up per end hea log againsl. ilie upper end lie cylinder space 53. Similar-1 a. cavity B is formed in the piston extension B of the anvil and the spring X resting on the bottom of this cavity has its upper end engaged by the mold support. The function of lne spring X is to partially, bat'not entirely, take the Weight of the mold support and its load oil the striking face B of the anvil. A treadle ll has its lever arms W pivotally connected at W to the opposite sides of the ahvil. The short ends of the lovers W are "pivotally connected at W to the links W The upper ends of these links are pivolally connected to diametrically 0pposing trunnions YV projecting from lhc cylinder A of the mold support. When the ouler'end of the treadle \V is depressed, the mold support is lifted oil the anvil and when. the outer end of the treadle is allowed to rise the mold support drops into engagement with the anvil. ll, will, of course, be apparent that in this construction the spring Q serves lo give l'he anvil an upward velocity al; lhe moment.- of impact which performs 3 lhe desired function of minimizing the effeet. on the base member l) of the shock of collision between the mold support and the anvil. The provision of the countcrbalanc ing spring X, of course, reduces the shocl-r of collision and thereby reduces the extento which the sand is compacted about the pattern at. each collision. ()n lhe other hand, the provision of die counlerbalancing spring X. irn'ikes it possible to operate molding machines of this type in which the Weight of the mold support pattern, flask and sand is entirely too great to permit the manual. tualion of the machine withoutsome coonterhalancing arrangement. As explained above, the refluption in the velocity With W iich the mo support falls when allowed to fall is in itself an advantage and 1' some circui'nslances.

The avoidance ol' my transmission of the shock of collision lo the support of the molding machine may he also obtained where other means lhan a resilient cushion is employed for causiuo' the necessary upward m nl a'l llic instant of impact, and in 1H l have ilhislraled one type apparains of this charaolor in which no resilient mishion is cn'iployed. In the construction shown in Fig". 10 the mold support is provided Willi a cylinder A, and the anvil B with a pislon B, by which the mold support and lhe anvil are guided in their relative ruovemenls. and he anvil is provided with a cavity ll, and lhe .J .n'ieinliier E with a pisl'on l5, by means of which the anvil and base are guided in their relative movements. The liasc mcn'ihoi. provided with diametrically opposed rmnnions Y. on which 211' journaled lever arms 2' of an operating lreadle lever Y Links Y are connected at. llieir upper ends to trunnions f projecting at diametrically oppoeed points from the ec oes anvil l3. The-lower ends of the links Y pivotnlly connected to the levers Y at points between the trunuions Y and the point Where power is applied to the levers At the opposite side of the trunnions Y, links Y ure-pivotully connected by bolts Y" to the levers Y.- The upper endsof the links it are journeled on trunnious Y exehclino at diametrically opposed points from the 'cy indcr A By properly proportioniug the distances between the trunnions Y end pivots Y and between the trurmions Y pivots lflit will be obvious that the mold support can be raised. oh? the striking fees of the anvil on the application of suitable, i /"eight to free end of the treadle Y". When a. Weight, as the weight. of the operator stonding on the free end of treuclle Y", is epplied to the treadle, the mold supportm raised and the anvil is lowcred, and when this Weight is removed the mold support tells and the anvil rises with u relative velocity dependent on the weights of the mold support and the anvil and the the anvil will have the necessary 11 nvurd velocity the instant of impact to so stantielly minimize the shock of collision on the base mem In order to permit the mold support and envil to be supported without requiring too great an expenditure oi power, and in order also to avoid the transmission of too great a. portion of the shock of collision to the base member B, through the trunnions Y, with varying loads, provision should be made for obtaining the proper leverage with varying loads. This may be accomplished as shown by providing slots Y in the levers Y through which the bolts Y pass, and in which the bolts maybe odjustubly secured to the levers Y at the desired distance from the trunnions Y.

lfn some cases a resilient cushion, which '18 formed in port by sprm s and in part by compressed air or other e ustic fluid under\ pressure, m be used with good results in 'w n 1 the vary types 01 par molding machines lll'l Whiel- 1 ll I have shown one arrange- 1S hind. in the machine shown in Fig. 11 the anvil B is in part supported by springs Q, as in the construction shownv in Fig. 4:, but these springs are not designed Fig. 1 to admit air under pressure to the cylinder space Ewheu the anvil moves be- Weight required to separate them, and that I low the desired lower level. In consequence, air is admitted to the space e to balance the varying loud put on the mold support. The resilient cushion, thus formed, partly by the springs Q and partly by the air under pressure in the space 6, gives the desired upward velocity to the anvil at the instant of impact, while the balancing of the anvil takes less air and requires air of less pressure, than the machine shownin Fig. 1. On the other hand, this form of apparatus possesses an advantage over such apparatus as is shown in Fig. it, or ih tthe other fi res in which a spring cushion is employe from the fact that the lower level of the anvil is not altered with varying loads on the mold support.

While, in accordance with the provisions of the statutes, 1 have hereinbcfore described and illustrated the best forms of my invention now known to me, it will boobvious to those skilled in the art that the invention may be embodied in many different forms of apparatus other than those de scribed and illustrated. It- Will also be apparent to those skilled in the art that-certain features of the invention may be used to advzintage under certain conditions without a corresponding use'of other features of the invention, and I do not Wish the claims hereinafter made to be limited to the embodiments disclosed more than is made inecessary by the state of the art.

No claim is made herein to the provisions shown for retarding the falling movement of the mold support in order to msure that. the mold I forming material shall bear\ firmly against the patterns throughout the falling movement. On the contrary, it is my intention to claim'such provisions in a separate application which i am about to file.

Having now described my invention What i I claim as new, and desire to secure 15y Let ters latent, is: A

mold support, a movable anvil, and means' for moving said anvil and mold sup ort each toward the other with such veloclties that the anvil has a substantial momentum .opposite in direction to the momentum of 118' the mold support at the instant of'impact.

2. In a jar moldinomachine, the combination with an anvil, or a. mold support which, is alternately lifted 0E and allowed to drop back on to the anvil, and means for giving 120 the anvil an upward movement. when they mold support is'dropped such that the anvil has a substantial momentum in the opposite direction to the momentum' of the mold support at the instant of impact.

3. In a jar molding machine, the .combiuation with a relatively movable mold sup ort and anvil, of mcmis'providing aresl ient support for the unvihudupted to give the anvil a movement toward the mold 1. In a jar molding machine, a. movable 1 16 support while the latter is moving toward the anvil such that the anvil has a substan an momentum opposite in direction to the momentum of the mold support at the in.- sl-ant of impact.

4. In a molding machine, the combination WllJll a stationary base member, a movable anvil member, one of said members having a cylinder and the other a piston working in saidrcylinder, a mold support, means for alternately lifting the mold support oil the anvil and allowing it to drop bacl: into engagement with the anvil, and means for maintaining a cushion of compressed air in said cylinder tendin to move 'the anvil upward when the Weight of the mold support and its loacl is taken off the anvil.

5. In a jar molding machine, the combination with a stationary base member, a movable anvil member, one of said members having a cylinder and the other a piston Working in said cylinder, a mold support,

means for alternately lifting the mold supvport ofi' lhe anvil. and allowing it to drop heel: into engagement, with the anvil, and means actuated by said anvil on its changes in position relativeto the base member for admitting air under pressure to said cylincler to check further downward movement of said anvil aficr the latter moves clown to a certain level.

6. In jar molding machine, the combination with a stationary base member, a movable anvil member, one of said members having a cylinder aml lhe other a'piston Working in said cylinder, a mold support, means for alternately lifting the mold support oil the anvil and allowing it to drop each into engagement with the anvil, and means actuated by said anvil on its changes in position relative to the base member for admitting air under pressure tosaid cylin- (ler siillicienl lo lloat said anvil and the weight of the lIlOlil. support and its load when the anvil inovi; below a certain level, and for pcrmilling air to es'ape from. the

cylinder when the anvil reaches a certain level above thelirst mentioned level.

7. In a molding machine, a vertically movable anvil, a vertically movable mold support mounted on said anvil, means for exciting an upwardly acting force on. the lllOlll support, the reaction of which is taken by lhe anvil to life the IilUlll support above the anvil preparatory lo collision, and means providing a re. ilient cushion for the anvil adapted to give the latter an apward movement, while themolil support falling", which continues nnlll collision occurs.

8. in a jar molding machine, a verlieally movable am'il, a verlically movable mohl eeneee support mounl'ecl on said anvil, means for.

exerting an upwardly acting force on the RIiOlCl support, the reaction of which is taken 'the. anvil adapted to sustain he anvil and I mold support at a level below, and. to sue :lain the anvil when freed from the Weight of gthe'inolcl support at a level above, the level ,at which collision occurs in normal operation. 9. In a jar molding machine, a vertically fmovahle anvil member, a mold support ineniher, one of said members being provided with a vertical piston and the other with a cooperating cylinder into which fluid unclcr pressure is admitted anolfronl which it is permitted to exhaust to produce alternate separations of, and collisions between, the mold support and anvil members, and means providing a resilient cushion for the anvil adapted lo give the laeter an n oward movement While the mold support is lalling which continues until collision takes place movable anvil member, a member, one of said members being pro videcl with a verlioal Qistonand the other with a coopei'e sin cylinder into which fluid under pressure is admitted and from which it ie-pemiittecl to exhaust to produce alternate, separations of, and collisions between the mold snfipor and anvil members, and means provioin a resilient supporling cushion for the anvi adapted to sustain the anvil and mold support at a level below, and. lo sustain the anvil when freed from the weight of the mold support at a level above, the level at which collision occurs in -normal operation.

11. In a jar molding machine, a base provided with an upstanding guide, an anvil vertically movable along sairl guide and provided at its upper'eml with an upstanding piston, a mold supper; provided with a hollow cylinder into which said piston ei'iters, 'Incans for admitting fluid under pressure to, and permitting it to exhaust from, the space in said cylinder above the piston in order to produce alternate se amt-ions of and collisions between the lllOld support and anvil, and means providing a resilient cushion between the base and the anvil adapted to sue tain the mold support and anvil al; a level below, and to from the weight of the mold support above, the level at which coll sion occurs in normal operation.

' l fllLFlll ll) Ll lsl'lll.

Witnesses Sil sustain the anvil when freed 

